Hey guys I'm thinking of getting a set of coils for my 335i e90 but i don't really know what to get. I've been looking at the sonic tuning ST1 coils and the H&R coils but cant really decide. what do you think is a better buy and better long term. i was also thinking of just spending the money and getting the kw v1 because of so many good things I've heard about them. so please give your input thank you.